#!/usr/bin/env python
# -*- coding: utf-8 -*-

# @Time     :2022/04/01
# @Author   :Changshu
# @File     :Exercise62.py

# 62. 不同路径

# 计算组合数
from math import comb
from math import perm

if __name__ == '__main__':
	# s=comb(8,2)
	# s=comb(1,1)
	# print(s)

	s=perm(5,2)
	print(s)